Circuit-changing mechanism.



PATENTED APR. 9, 1907,

R7 CIRCUIT GHANGING MECHANISM.

H. WEBSTE APPLICATION FILED JAN. 3,1905.

' tension from each end ol said chanical 2. An electromagnetic circuit-changing device comprising an electromagnet, an extension from each end of the magnet-core, an armature and a [lat spring secured to one of said extensions and extending in parallel directions toward the other projection, a meconnection between said spring and armature near their outer ends, said. armsture lying between said magnet and spring and overlappingsaid other projection, and said spring ieing' llexed so asto dr do; said armature away from said overlapped projection and magnet-core, and a stop for said spring to maintain a deiinite normal air-gap between said arnnitureaml overlapped projection. v

3, An electromagneticcircuit-changing devicecornprising an eleetromagnet, an ex magnet-eore, a substantially straight armature axially mounted on one of said extensions and l]l()\'- able toward said core into engagement with said other extension, a substantially flat spring fixed to said former extension and ex.- tending in a direction substantially parallel to said armature, said spring being Iilet'lliti'lically connected to said armature and llexed so as to draw said armature away from the said overlapped projection, and a stop tor said spring to maintain a definite normal airgap between said armature and overlapped projection.

4. An electromagnetic circuit-changing device comprising an elcctromagnet, lateral extensions from the ends or said core, a sul1- stantially straight armature axially mounted on one of said extensions and overlapping the other extension, a substantially flat spring fixed to said formerextension and extending in a direction substantially parallel to said armature, said spring being mechanically connected to said armati're and flexed so as to draw said armature away from said overlapped projection and maguet-core, and a stop for said spring to maintain a definite normal air-gap between said armature and overlapped projection,

5. An electromagnetic circuit-changing device comprising an clectromagnet, an ex tension from each end of said core, a suhst zintially straight armature axially mounted on one extension and extending along and in close proximity to the magnet-winding, with no magnetic material intervening, to the other extension toward which it is drawn in response to the encrgization of the magnet,

a parallel spring lying adjacent to the outer side of said armature fixed to the same e24 tension as said armature, mechanically connected thereto near its free end, and flexed so as to draw said armature away from said other extension and the magnet-core, and a stop for said spring to maintain a deliuite normal air-gap between said ari'nature and said other extension.

said extensions and overlapping the other extension, a sul'istantially flat spring hired to said former extension and extending" in a di cctionsubstantially parallel to said armature, said spring b ing; mechanically connected to said arma we and flexed so as to draw said armature from. said overlapped projection, and a second flat lying substantially pa. llel 'to said li' stanenlioned spring and not nall r engaging the same to limit the outward in Yeinent thereof.

7'. An electromagnetic ciri'ruit-clianging device comprising an eleetroniagnet, an e:- tension fronrcach of the magnet-core,

suljistantially e ght mounted on one of d lappii the other uon, a substantially flat s Eng fixed to saltn i extension and extending in direction suhsta tially parallel to said armature, said spring being" lllfiifillttllr ically connected to said :irniat re and flexed so as to draw said armature away from said overlapped projection and the magnet-core, a second flat spring lying substantially parallel to said lirstenentioned spring and inward toward the latter to engage the to liniitits outward n'iovernent, and a stop to normally engage said second llat spring maintain it in a definite position.

5%. An electromagnetic circuit changing device comprising an electronmgnet, an extension from each end the magnet-core, a substantially straight a tore axially mounted on one of said extensio and oven lappinp the other extension, a substantially l lat spring fixed to said former ext-en ,on'and extending in a direction substantially t arellel to said armature, said spring being mechani eally iwmnected to said armature and flexed so as to draw said armature away from said overlapped projection, a second fiat spring lying substantially parallel to frst'mentioncd spring and pressing int-lard toward the latter to engage the same to limit its outward movement, and a stop mounted on said overapped projection and operative to normally engage said second flat spring to maintain'it in a definite position.

9. An electromagnetic circuit-changing device comprising an 4llOCtZOlDQQ'DPFUOlG, an extension from each end of said core, a sub; stantially straight armature axially secured at one end to one of said extensions and overlapping the other extension at its other end, three substantially llat springs iixed to said l'ormer extension and extemliugz, in a direction substantially parallel to said armature, a mechanical connection between said armature, and the center spring, and means lor maintaining the other springs apart, said center ez-ztensions and overarmature axially 9 pressing sp g normally pressing ageinst the outer my name'this 10th day of December, spring to maintain a definite air-gap between 1904.

said armature and the overlapped projection but movable into engagement with the inner HARRY WEBSTER 5 spring in response to' the magnetic pull of th Witnesses:

me net-core. L. D. KELLOGG,

n witness whereof I hereunto subscrib G. E MUELLER, 

